Wire-working machine.



E. J. MGILVRIED. WIRE WORKING MACHINE. APPLICATION FILED OUT. 17, 1907.

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Pi J WITNESSES INVENTOR Patented July 25, 1911.

E. J. McILVRIED. WIRE. WORKING MACHINE. APPLICATION FILED OCT. 17, 1907.

Patented July 25, 1911.

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WITNESSES E. J. McILVRIED.

WIRE WORKING MACHINE.

APPLICATION IILED OCT. 17, 1907. 999,052. Patented July 25,1911.

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WITNESSES 5w INVENTOR 540% 'fiwcf MW oww, 4 panda,

EDWIN J". IMQILVRIED, OF PITTSBURG, PENNSYLVANIA.

WIRE-WORKING MACHINE.

Specification of Letters Patent. Patented July 25, 1911.

Application filed October 17, 1907. Serial No. 397,875.

To all whom it may concern:

Be it known that I, EDWIN J. MCILVRIED, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Improvement in Tire-WorkingMachines, of which the followin is a full, clear, and exact description,re erence being had to the accompanying drawings, forming part of thisspecification, in which' Figure 1 is a plan view of a Wire nail machineconstructed in accordance with my invention; Fig. 2 is a side elevationof the same; Fig. 3 is an enlarged partial plan view; Fig. 4 is asection on the line IVIV of Fig. 3; and Fig. 5 is a partial frontelevation showing the drawing mechanism.

My invention relates to the class of wire workingmachines and isdesigned to provide a feeding attachment for such machmes which willdraw the wire or wire rod to the necessary gage for the requiredarticle;thus doing away with the previous drawing operation before feedng thematerial to the machine.

To that end the invention consists in combining with a wire workingmachine, a wire drawing mechanism which acts as a feed for the wireworking machine. In the preferred form, this wire drawing mechanismtakes the place of the ordinary reciprocating feed device, the drawingmechanism forming the functions both of drawingand feeding, as itreciprocates.

In the drawings, I show a wire nail machine of the ordinary type,provided with my improved drawing and feeding device. In this form, 2represents the main driving shaft of the machine carrying the usual camsand eccentrics or cranks which operate the cut-oif levers 3, 3, theheading die or sllde 1 and the pinch lever 5.

6 are the usual cut-off dies and 7 the pinch rod, 8 being the removableheading die. 'Ithe connecting rod 9 is pivoted to a lever 10 securedto'and operating the transverse rock shaft 11, which is provided withlever arm 12, actuating the slide 13 as shown in Fig. 4. This slide 13is provided with an endwise removable and adjustable drawing and feedingdie 14 which is shown as secured by a dovetailed connection. The die isprovided with a .series of conical or tapered drawing holes, any one ofwhich may be adjusted into line with the hole in the heading die so asto thread the wire through it. The stroke or length-of feed may beadjusted by means of the sliding block 15. The slide carrying thefeeding and drawing die moves within suitable guides 16.

In the operation of the machine the wire is pulled through the dies andgripped by the pinch lever 7 in the headen dies. The

machine is then started into motion, the

slide 13 having been drawn back over the wire, drawing it to gage as theheader is coming forward to head the wire. The header and the slide 13reversev their direction of movement at the same time that the grippingor pinching device releases the .wire'. The wire is then fed forwardfollowing up the header until the header and feeding slide again changedirection, at

which time the grip again operates to pinch or grip the wire and thecutter levers operate to point and cut off the nail. At every backwardmotion of the feeding slide, the drawing die acts upon the wire to drawit to gage, during this movement, the wire being held at this time bybeing gripped in the wire working machine. Theoperations are repeated ateach revolution of the crank shaft.

The advantages of my invention will be obvious to those skilled in theart. The previous drawing of the Wire to the gage required in the wireworking machine is avoided and the reciprocating feed for. the wireworking machine itself performs the drawing operation. The cost of theproduct is thus reduced while the wire working machine is not materiallyincreased in complexity since the feed performs the double function offeeding and drawing.

The'wire working'machine may be of any ranged to hold the wire duringthe drawing stroke of the feed and release it for the feeding movementthereof, substantially as described. 7

2. In a machine of the character described, a heading tool for headingwire, a drawing die, a gripping device for gripping the wire while it isbeing drawn, and means for imparting a reciprocating movement to thedrawing die, the parts being arranged so that the wire is drawn when thedie is moved in one direct-ion and fed forward when moved in the otherdirection; substantially as described.

3. In a machine of the character described, a heading tool, a grippingdevice adjacent to the tool for holding the Wire while it is beingheaded, a drawing die in the rear of the gripping device, and means foractuating the gripping device and for imparting a drawing movement tothe drawing die in timed relation-to the operation of the grippingdevice; substantially as described.

4. The combination with a wire working machine, of a combined feed anddrawing device therefor, a heading tool, connections for moving saiddevice back and forth, the feed and drawing device being arranged tofeed the wire forward during its movement in one direction and to drawthe wire during its movement in the other direction, and grippingmechanism arranged to 'hold the wire when it is being drawn and head'edand to release it when feeding the wire forward; substantially asdescribed.

In testimony whereof, I have hereunto set my hand.

EDWIN J. MCILVRIED. Witnesses:

LAURENCE H. LEE, H. M. Conwm.

